datapath/linux/compat/include/net/net_namespace.h

   1 #ifndef __NET_NET_NAMESPACE_WRAPPER_H
   2 #define __NET_NET_NAMESPACE_WRAPPER_H 1
   3
   4 #include_next <net/net_namespace.h>
   5
   6 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33)
   7 /* for 2.6.32* */
   8 struct rpl_pernet_operations {
   9         int (*init)(struct net *net);
  10         void (*exit)(struct net *net);
  11         int *id;
  12         size_t size;
  13         struct pernet_operations ops;
  14 };
  15 #define pernet_operations rpl_pernet_operations
  16
  17 #define register_pernet_device rpl_register_pernet_gen_device
  18 #define unregister_pernet_device rpl_unregister_pernet_gen_device
  19
  20 #define compat_init_net ovs_compat_init_net
  21 int ovs_compat_init_net(struct net *net, struct rpl_pernet_operations *pnet);
  22 #define compat_exit_net ovs_compat_exit_net
  23 void ovs_compat_exit_net(struct net *net, struct rpl_pernet_operations *pnet);
  24
  25 #define DEFINE_COMPAT_PNET_REG_FUNC(TYPE)                                       \
  26                                                                         \
  27 static struct rpl_pernet_operations *pnet_gen_##TYPE;                   \
  28 static int compat_init_net_gen_##TYPE(struct net *net)  \
  29 {                                                                       \
  30         return compat_init_net(net, pnet_gen_##TYPE);                   \
  31 }                                                                       \
  32                                                                         \
  33 static void compat_exit_net_gen_##TYPE(struct net *net) \
  34 {                                                                       \
  35         compat_exit_net(net, pnet_gen_##TYPE);                          \
  36 }                                                                       \
  37                                                                         \
  38 static int rpl_register_pernet_gen_##TYPE(struct rpl_pernet_operations *rpl_pnet)       \
  39 {                                                                               \
  40         pnet_gen_##TYPE = rpl_pnet;                                             \
  41         rpl_pnet->ops.init = compat_init_net_gen_##TYPE;                        \
  42         rpl_pnet->ops.exit = compat_exit_net_gen_##TYPE;                        \
  43         return register_pernet_gen_##TYPE(pnet_gen_##TYPE->id, &rpl_pnet->ops); \
  44 }                                                                                       \
  45                                                                                         \
  46 static void rpl_unregister_pernet_gen_##TYPE(struct rpl_pernet_operations *rpl_pnet)            \
  47 {                                                                                       \
  48         unregister_pernet_gen_##TYPE(*pnet_gen_##TYPE->id, &rpl_pnet->ops);             \
  49 }
  50 #else
  51 #define DEFINE_COMPAT_PNET_REG_FUNC(TYPE)
  52 #endif /* 2.6.33 */
  53
  54 #if LINUX_VERSION_CODE < KERNEL_VERSION(4,1,0)
  55 typedef struct {
  56 #ifdef CONFIG_NET_NS
  57         struct net *net;
  58 #endif
  59 } possible_net_t;
  60
  61 static inline void rpl_write_pnet(possible_net_t *pnet, struct net *net)
  62 {
  63 #ifdef CONFIG_NET_NS
  64         pnet->net = net;
  65 #endif
  66 }
  67
  68 static inline struct net *rpl_read_pnet(const possible_net_t *pnet)
  69 {
  70 #ifdef CONFIG_NET_NS
  71         return pnet->net;
  72 #else
  73         return &init_net;
  74 #endif
  75 }
  76 #else /* Linux >= 4.1 */
  77 #define rpl_read_pnet read_pnet
  78 #define rpl_write_pnet write_pnet
  79 #endif /* Linux >= 4.1 */
  80
  81 #endif /* net/net_namespace.h wrapper */